package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.dto.SetmealDto;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.entity.SetmealDish;
import com.itheima.reggie.mapper.SetmealMapper;
import com.itheima.reggie.service.SetmealDishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

/**
 * @author: 爱学Java 不想秃头的 KK
 * @date: 2023/7/26 16:56
 * @version: 1.0
 * @Created with IntelliJ IDEA.
 * @Description:
 */

@Service
@Transactional
public class SetmealServiceImpl extends ServiceImpl<SetmealMapper, Setmeal> implements SetmealService {

    @Autowired
    private SetmealDishService setmealDishService;
    @Autowired
    private SetmealService setmealService;

    @Override
    public void saveWithDish(SetmealDto setmealDto) {
        //保存套餐的基本信息，操作setmeal，执行insert操作
        this.save(setmealDto);

        List<SetmealDish> setmealDishList = setmealDto.getSetmealDishes();
        setmealDishList.stream().map((item) -> {
            item.setSetmealId(setmealDto.getId());
            return item;
        }).collect(Collectors.toList());

        //保存套餐和菜品的关联信息，操作setmeal_dish，执行insert操作
        setmealDishService.saveBatch(setmealDishList);
    }

    @Override
    public SetmealDto getSetmealWithDish(Long id) {
        Setmeal setmeal = setmealService.getById(id);
        SetmealDto setmealDto = new SetmealDto();
        BeanUtils.copyProperties(setmeal, setmealDto);

        LambdaQueryWrapper<SetmealDish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(SetmealDish::getSetmealId, id);
        List<SetmealDish> setmealDishList = setmealDishService.list(queryWrapper);
        setmealDto.setSetmealDishes(setmealDishList);
        return setmealDto;
    }

    @Override
    @Transactional
    public void removeSetmealWithDish(List<Long> ids) {
        //查询套餐是否停售，确定是否可以删除
        LambdaQueryWrapper<Setmeal> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.in(Setmeal::getId,ids) //in表示在getID对应的数据可的字段中查找匹配的
                    .eq(Setmeal::getStatus,1);
        int count = this.count(queryWrapper);
        if (count > 0){
            //如果不能删除，抛出一个业务异常
            throw new CustomException("套餐正在售卖中,无法删除！");
        }
        //如果可以删除，先删除套餐表中的数据---setmeal
        this.removeByIds(ids);

        //删除关系表中的数据----setmeal_dish
        LambdaQueryWrapper<SetmealDish> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.in(SetmealDish::getSetmealId,ids);

        setmealDishService.remove(lambdaQueryWrapper);

    }
}
